JP4622752B2 - 磁気記録媒体の製造方法 - Google Patents
磁気記録媒体の製造方法 Download PDFInfo
- Publication number
- JP4622752B2 JP4622752B2 JP2005255479A JP2005255479A JP4622752B2 JP 4622752 B2 JP4622752 B2 JP 4622752B2 JP 2005255479 A JP2005255479 A JP 2005255479A JP 2005255479 A JP2005255479 A JP 2005255479A JP 4622752 B2 JP4622752 B2 JP 4622752B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- film thickness
- paint
- coating
- underlayer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/848—Coating a support with a magnetic layer by extrusion
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/733—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the addition of non-magnetic particles
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/733—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the addition of non-magnetic particles
- G11B5/7334—Base layer characterised by composition or structure
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
- G11B5/73929—Polyester substrates, e.g. polyethylene terephthalate comprising naphthalene ring compounds, e.g. polyethylene naphthalate substrates
Landscapes
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Description
非磁性粉末:針状α−FeOOH 80.0重量部
(平均長軸長:0.1μm、結晶子径:12nm)
非磁性粉末:カーボンブラック 20.0重量部
(三菱化学(株)製 商品名:#950B)
電子線硬化型結合剤:電子線硬化型塩化ビニル樹脂 12.0重量部
(東洋紡績(株)製 商品名:TB−0246)
電子線硬化型結合剤:電子線硬化型ポリウレタン樹脂 10.0重量部
(東洋紡績(株)製 商品名:TB−0216)
分散剤:高分子量ポリエステル酸アマイドアミン塩: 1.0重量部
(楠本化成(株)製 商品名:DA−7500)
研磨剤 α−アルミナ 5.0重量部
(住友化学工業(株)製 商品名:HIT60A、平均粒径:0.18μm)
NV(固形分濃度)=33(質量%)
溶剤比率 MEK/トルエン/シクロヘキサノン=2/2/1(質量比)
をニーダーで混練した後、横型のピンミルにて分散した。その後、さらに、下記の材料、
潤滑剤:脂肪酸 1.0重量部
(日本油脂(株)製 商品名:NAA180)
潤滑剤:脂肪酸アマイド 0.5重量部
(花王(株)製 商品名:脂肪酸アマイドS)
潤滑剤:脂肪酸エステル 1.5重量部
(日光ケミカルズ(株)製 商品名:NIKKOLBS)
を添加して、
NV(固形分濃度)=25(質量%)
溶剤比率 MEK/トルエン/シクロヘキサン=2/2/1(重量百分率)
となるように希釈した後、分散し、下地層20となる塗料を作製した。
磁性粉末:Fe系針状強磁性粉末 100.0重量部
(Fe/Co/Al/Y=100/24/5/8(原子比)、Hc:188kA/m、σs:140Am2/kg)
結合剤:塩化ビニル共重合体 10.0重量部
(日本ゼオン(株)製 商品名:MR110)
結合剤:ポリエステルポリウレタン 6.0重量部
(東洋紡績(株)製 商品名:UR8300)
分散材:リン酸系界面活性剤 3.0重量部
(東邦化学工業(株)製、商品名:RE610)
研磨剤 α−アルミナ 10.0重量部
(住友化学工業(株)製 商品名:HIT60A)
NV(固形分濃度)=30(質量%)
溶剤比率 MEK/トルエン/シクロヘキサノン=4/4/2(質量比)
をニーダーで混練した後、横型のピンミルにて分散した。このようにして得られた塗料を3つに分け、そのうちの一つは
NV(固形分濃度)=8(質量%)
溶剤比率 MEK/トルエン/シクロヘキサン=13/13/74(重量比)
となるように希釈してから、仕上げ分散を行った。
NV(固形分濃度)=5(質量%)
溶剤比率 MEK/トルエン/シクロヘキサン=7.5/7.5/85(重量比)
となるように希釈してから、仕上げ分散を行った。
NV(固形分濃度)=3(質量%)
溶剤比率 MEK/トルエン/シクロヘキサン=4.5/4.5/91(重量比)
となるように希釈してから、仕上げ分散を行った。
熱硬化剤 10.0重量部
(日本ポリウレタン工業(株)製 コロネートL)
を添加混合し、3種類の磁性塗料10を作製した。
カーボンブラック 75重量部
(キャボット社製 商品名:BP−800)
カーボンブラック 10重量部
(キャボット社製 商品名:BP−130)
硫酸バリウム 15重量部
(堺化学工業(株)製 バリファインBF−20)
ニトロセルロース 80重量部
(旭化成工業(株)製 商品名:BTH1/2)
ポリウレタン樹脂 40重量部
(東洋紡績(株)製 商品名:UR−8300)
メチルエチルケトン 150重量部
トルエン 150重量部
シクロヘキサン 80重量部
をニーダーで充分に混練した後、サンドグラインドミル分散を行った。更に、下記の材料
メチルエチルケトン 400重量部
トルエン 400重量部
シクロヘキサン 200重量部
を投入し、更に分散を行った。このようにして得られた混合液に
熱硬化剤 20重量部
(日本ポリウレタン工業(株)製 コロネートL)
を混合し、バックコート層用塗料を作製した。
上記実施例と同じ固形分濃度NV(質量%)が3%、5%、8%の3種類の磁性塗料10を、それぞれ(2300nmよりも大きい)2400nm、3500nmの2種類のウェット膜厚Twで塗布し、乾燥させてドライ膜厚Tdが異なる6種類の磁気テープを作製した。
12…支持体
14…磁性層
16…ノズル
16A…スリット
20…下地層
S102…磁性塗料塗布工程
S104…磁性塗料乾燥工程
S106…裁断工程
Claims (2)
- 非磁性の支持体の上に形成された非磁性の下地層の上に固形分濃度NV(質量%)が3≦NV≦8である磁性塗料を500(nm)≦Tw≦2000(nm)の範囲のウェット膜厚Twで塗布する塗布工程と、前記磁性塗料を乾燥させて9(nm)≦Td≦53(nm)の範囲のドライ膜厚Tdの磁性層を形成する磁性塗料乾燥工程と、を含むことを特徴とする磁気記録媒体の製造方法。
- 請求項1において、
前記下地層を前記支持体の上に1.2μm以下の膜厚で形成し、前記塗布工程において該膜厚が1.2μm以下の下地層の上に前記磁性塗料を塗布することを特徴とする磁気記録媒体の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005255479A JP4622752B2 (ja) | 2005-09-02 | 2005-09-02 | 磁気記録媒体の製造方法 |
US11/513,192 US7862853B2 (en) | 2005-09-02 | 2006-08-31 | Method for manufacturing magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005255479A JP4622752B2 (ja) | 2005-09-02 | 2005-09-02 | 磁気記録媒体の製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007073086A JP2007073086A (ja) | 2007-03-22 |
JP4622752B2 true JP4622752B2 (ja) | 2011-02-02 |
Family
ID=37830316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005255479A Expired - Fee Related JP4622752B2 (ja) | 2005-09-02 | 2005-09-02 | 磁気記録媒体の製造方法 |
Country Status (2)
Country | Link |
---|---|
US (1) | US7862853B2 (ja) |
JP (1) | JP4622752B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6813069B1 (ja) * | 2019-10-01 | 2021-01-13 | ソニー株式会社 | 磁気記録媒体、磁気記録再生装置および磁気記録媒体カートリッジ |
JP2022027074A (ja) * | 2020-07-31 | 2022-02-10 | 富士フイルム株式会社 | 磁気記録媒体、磁気テープカートリッジおよび磁気記録再生装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001084583A (ja) * | 1999-09-14 | 2001-03-30 | Tdk Corp | 磁気記録媒体及びその製造方法 |
JP2003296915A (ja) * | 2002-03-29 | 2003-10-17 | Tdk Corp | 磁気記録媒体 |
JP2003305393A (ja) * | 2002-04-18 | 2003-10-28 | Fuji Photo Film Co Ltd | グラビア塗布装置 |
JP2005158263A (ja) * | 2005-03-07 | 2005-06-16 | Tdk Corp | 磁気記録媒体の製造方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09185822A (ja) * | 1995-12-30 | 1997-07-15 | Tdk Corp | 磁気記録媒体の製造方法 |
US20050074635A1 (en) * | 2002-03-19 | 2005-04-07 | Nippon Sheet Glass Co., Ltd. | Information recording medium and method of manufacturing glass substrate for the information recording medium, and glass substrate for the information recording medium, manufactured using the method |
JP4263574B2 (ja) | 2003-09-30 | 2009-05-13 | Tdk株式会社 | 磁気記録媒体の製造方法 |
-
2005
- 2005-09-02 JP JP2005255479A patent/JP4622752B2/ja not_active Expired - Fee Related
-
2006
- 2006-08-31 US US11/513,192 patent/US7862853B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001084583A (ja) * | 1999-09-14 | 2001-03-30 | Tdk Corp | 磁気記録媒体及びその製造方法 |
JP2003296915A (ja) * | 2002-03-29 | 2003-10-17 | Tdk Corp | 磁気記録媒体 |
JP2003305393A (ja) * | 2002-04-18 | 2003-10-28 | Fuji Photo Film Co Ltd | グラビア塗布装置 |
JP2005158263A (ja) * | 2005-03-07 | 2005-06-16 | Tdk Corp | 磁気記録媒体の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
US7862853B2 (en) | 2011-01-04 |
JP2007073086A (ja) | 2007-03-22 |
US20070054039A1 (en) | 2007-03-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10475481B2 (en) | Magnetic tape having characterized backcoat layer and method of manufacturing the same | |
US7144643B2 (en) | Magnetic recording medium | |
US11302351B2 (en) | High density magnetic recording medium and cartridge including high density magnetic recording medium | |
JP2018137020A (ja) | 磁気テープ | |
JP2018137016A (ja) | 磁気テープ | |
JP2018137017A (ja) | 磁気テープ | |
JP6635217B1 (ja) | 磁気記録媒体、磁気記録再生装置および磁気記録媒体カートリッジ | |
JP2006127602A (ja) | 磁気テープ媒体 | |
JP4622752B2 (ja) | 磁気記録媒体の製造方法 | |
US11651781B2 (en) | Tape-shaped magnetic recording medium and cartridge | |
JP2006260613A (ja) | 磁気記録媒体 | |
JP4090642B2 (ja) | 磁気記録媒体 | |
JP2007042162A (ja) | 磁気記録媒体 | |
JP2001134919A (ja) | 磁気記録媒体 | |
US20040214048A1 (en) | Magnetic recording medium | |
JP4263574B2 (ja) | 磁気記録媒体の製造方法 | |
JP4144924B2 (ja) | 磁気テープのトラッキング方法、磁気記録再生装置および磁気テープ | |
JP2002367159A (ja) | 磁気記録媒体の製造方法 | |
JP4151762B2 (ja) | 磁性塗料の製造方法および磁気記録媒体の製造方法 | |
JP2004063010A (ja) | 磁気記録媒体 | |
JP2007265536A (ja) | 磁気記録媒体の製造方法 | |
JP2002025038A (ja) | 磁気記録媒体 | |
JPH04251427A (ja) | 磁気記録媒体 | |
JP2006196165A (ja) | 低広帯域ノイズの磁気記録媒体 | |
JP2000090427A (ja) | 磁気記録媒体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080428 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20091217 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100209 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100409 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100817 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100910 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20101005 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20101018 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131112 Year of fee payment: 3 |
|
LAPS | Cancellation because of no payment of annual fees |